I don't understand why but in the past, I use this software frequently without any error. But now, whenever I edit or delete or create any boot entry and reboot, all my changes disappear. My laptop is Dell 15R 5520
I think maybe because of the new version but I don't know how to get the older version to test

I have no experience with this program in the past but I just downloaded it over the weekend and am having the exact same issue as OP. I can open the program and add entries just fine. I can even add an entry for linux and select the one time boot option and reboot into GRUB bootloader for linux. Upon restart of machine, it will boot straight to windows and when I open EASYUEFI my user created entries are no longer there.

I am currently using version 2.4 Release 2 (Build: 20 Jan 2016) on Windows 10.

I will try the older versions linked above and report back.

**Update 1: Installed 2.2 and no change. Also I have 'Fast Restart' and 'Secure Boot' disabled to provide further environmental variables.